BUG: DBPROCEDURE WITHOUT OUTPUT PARAMS

Hello,
   When I create db procedure without OUT parameter and I try to 
update/insert some records within this dbprocedure, this one don't 
return number of updated/inserted records.
For example:

     CREATE TABLE test_table (
         test_value VARCHAR(50)
     )
    

      CREATE DBPROCEDURE update_test_value (
         IN in_old_test_value VARCHAR(50),
         IN in_new_test_value VARCHAR(50)
      )
      AS
      TRY
         UPDATE test_table SET
                test_value = :in_new_test_value
         WHERE test_value = :in_old_test_value;
      CATCH
         IF $RC <> 0 THEN STOP ($RC, $ERRMSG);


         This is the java code that call db procedure. There is expected 
number of updated records in the variable iUpdateCount but allways 0 is 
returned.


        CallableStatement updateStatement = null;
        int               iUpdateCount   = 0;

         updateStatement = dbConnection.prepareCall(strUpdateCall);
         updateStatement.setString(1, strOldValue);
         updateStatement.setString(2, strNewValue);
           
         // here is the bug in SAP DB, if there is called stored 
procedure without
         // output parameters, there is not returned number of updated 
records  
         iUpdateCount = updateStatement.executeUpdate();

   Db procedure returns correct number of updated records when I add
an OUT paramete into the db procedure.

  Is this feature of the SAP DB procedures or bug?

  Thanks for answer,
  Julian